Accelerator Physics

2021-08-31
06:02
 Frequency sweeping interferometry for robust and reliable distance measurements in harsh accelerator environment / Sosin, M (CERN) ; Mainaud-Durand, H (CERN) ; Rude, V (CERN) ; Rutkowski, J (CERN) High radiation levels, ultra-high vacuum, cryogenic temperatures of the measured components and high electro-magnetic noise push accelerator surveyors to look for more robust and accurate solutions of alignment. In the framework of the High-Luminosity LHC project at CERN, a range of new and cost-optimized solutions using Fourier analysis based Frequency Sweeping Interferometry (FSI), are under development. [...] 2019 - Published in : Proc. SPIE 11102 (2019) 111020L In : Developments in X-Ray Tomography XII, San Diego, CA, United States, 11 - 15 Aug 2019, pp.111020L

2021-08-31
06:02
 CERN Secondary Beamlines Software Migration Project / Gerbershagen, Alexander (CERN) ; Banerjee, Dipanwita (CERN) ; Bernhard, Johannes (CERN) ; Brugger, Markus (CERN) ; Charitonidis, Nikolaos (CERN) ; D'Alessandro, Gian Luigi (CERN ; Royal Holloway, U. of London) ; Gatignon, Laurent (CERN) ; Montbarbon, Eva (CERN) ; Peres, Inbal (CERN ; Technion) ; Rae, Bastien (CERN) et al. The Experimental Areas group of the CERN Engineering department operates a number of beamlines for the fixed target experiments, irradiation facilities and test beams. The software currently used for the simulation of the beamline layout (BEATCH), beam optics (TRANSPORT), particle tracking (TURTLE) and muon halo calculation (HALO) has been developed in FORTRAN in the 1980s and requires an update in order to ensure long-term continuity. [...] 2019 - 6 p. - Published in : 10.18429/JACoW-ICALEPCS2019-MOPHA047 Fulltext: PDF; In : 17th Biennial International Conference on Accelerator and Large Experimental Physics Control Systems (ICALEPCS), New York, United States, 5 - 11 Oct 2019, pp.MOPHA047

2021-08-31
04:21
 Wake field, impedance and collective instability / Métral, Elias (CERN) The first mention of the impedance concept appeared on November 1966 in the CERN internal report "Longitudinal instability of a coasting beam above transition, due to the action of lumped discontinuities" by V.G. [...] arXiv:2108.11655. - 24 p.

2021-08-27
15:15
 CERN Summer Student Report: The study of a local observable for linear lattice imperfections / Kalos, Sebastian This report summarizes my experience as a CERN 2021 summer student and describes the project I worked on. [...] CERN-STUDENTS-Note-2021-068. - 2021. Access to fulltext

2021-08-20
21:36
 Summer Student Project report 2021: Analytical Emittance estimates for the FCC-ee. / Worth, Hannah In this report, a series of analytical methods were carried out to study the effect of specific Future Circular electron-positron Collider (FCC-ee) lattice errors on the vertical emittance estimates, specifically, from the quadrupoles. [...] CERN-STUDENTS-Note-2021-040. - 2021. Access to fulltext

2021-08-20
18:05
 Evaluation of the closest tune approach and its MAD-X implementation / Hoydalsvik, Eirik Jaccheri (Norwegian University of Science and Technology (NTNU) (NO)) ; Persson, Tobias Hakan Bjorn (CERN) ; Tomas Garcia, Rogelio (CERN) The closest tune approach (ΔQmin) is a measure of the transverse coupling in an accelerator. [...] CERN-ACC-NOTE-2021-0022. - 2021. - 15 p. Full text

2021-08-19
06:36
 On the mechanics of MQXFB—the low-beta quadrupole for the HL-LHC / Takala, E (CERN) ; Bianchi, L (CERN) ; Lackner, F (CERN) ; Ferracin, P (LBL, Berkeley) ; Izquierdo Bermudez, S (CERN) ; Pulikowski, D (CERN) The High Luminosity Large Hadron Collider (LHC) Project target is to reach an integrated luminosity of the LHC of 3000 fb$^{−1}$, corresponding to a factor 10 increase in collisions with respect to the current accelerator. One of the main components is the superconducting quadrupole called MQXF. [...] 2021 - 20 p. - Published in : Supercond. Sci. Technol. 34 (2021) 095002 Fulltext: PDF;

2021-08-14
06:58
 A Software Suite for the Radiation Tolerant Giga-bit Transceiver - Slow Control Adapter / Moschovakos, Paris (CERN) ; Boterenbrood, Henk (Nikhef, Amsterdam) ; Koulouris, Aimilianos (Natl. Tech. U., Athens) ; Nikiel, Piotr (CERN) ; Schlenker, Stefan (CERN) The future upgrades of the LHC (Large Hadron Collider) will increase its luminosity. To fulfill the needs of the detector electronic upgrades and in particular to cope with the extreme radiation environment, the GBT-SCA (Giga-Bit Transceiver - Slow Control Adapter) ASIC was developed for the control and monitoring of on-detector electronics. [...] 2019 - 5 p. - Published in : 10.18429/JACoW-ICALEPCS2019-WEPHA102 Fulltext: PDF; In : 17th Biennial International Conference on Accelerator and Large Experimental Physics Control Systems (ICALEPCS), New York, United States, 5 - 11 Oct 2019, pp.WEPHA102

2021-08-14
06:58
 Automatic Reconfiguration of CERN 18 kV Electrical Distribution - the Auto Transfer Control System / Letra Simoes, Joao (CERN) ; Infante, Sonia (CERN) ; Marin, Florian (CERN) Availability is key to electrical power distribution at CERN. The CERN electrical network has been consolidated over the last 15 years in order to cope with the evolving needs of the laboratory and now comprises a 200 MW supply from the French grid at 400 kV, a partial back up from the Swiss grid at 130 kV and 16 diesel generators. [...] 2019 - 4 p. - Published in : 10.18429/JACoW-ICALEPCS2019-MOPHA080 Fulltext: PDF; In : 17th Biennial International Conference on Accelerator and Large Experimental Physics Control Systems (ICALEPCS), New York, United States, 5 - 11 Oct 2019, pp.MOPHA080

2021-08-14
06:58
 The Distributed Oscilloscope: A Large-Scale Fully Synchronised Data Acquisition System Over White Rabbit / Lampridis, Dimitrios (CERN) ; Gingold, Tristan (CERN) ; Malczak, Milosz (CERN ; Warsaw U.) ; Vaga, Federico (CERN) ; Włostowski, Tomasz (CERN) ; Wujek, Adam (CERN) A common need in large scientific experiments is the ability to monitor by means of simultaneous data acquisition across the whole installation. Data is acquired as a result of triggers which may either come from external sources, or from internal triggering of one of the acquisition nodes. [...] 2019 - 8 p. - Published in : 10.18429/JACoW-ICALEPCS2019-TUBPR01 Fulltext: PDF; In : 17th Biennial International Conference on Accelerator and Large Experimental Physics Control Systems (ICALEPCS), New York, United States, 5 - 11 Oct 2019, pp.TUBPR01